Method and apparatus for controlling heating catalyst temperature based on prediction model of unburned hydrocarbon in heating catalyst

摘要

Disclosed is a method of controlling a heating catalyst temperature based on a prediction model of unburned hydrocarbon in a heating catalyst. According to the present invention, the method comprises: a step 1 of calculating a mass flow rate of unburned hydrocarbon stored in a heating catalyst in accordance with a front end temperature and exhaust flow rate of the heating catalyst by using a storage prediction model; a step 2 of using the calculated mass flow rate of unburned hydrocarbon stored in the heating catalyst and a mass flow rate of unburned hydrocarbon consumed previously in the heating catalyst to calculate a total volume of the unburned hydrocarbon stored in the heating catalyst; a step 3 of calculating a mass flow rate of the consumed unburned hydrocarbon from the calculated total volume of unburned hydrocarbon in the heating catalyst in accordance with the front end temperature and exhaust flow rate of the heating catalyst by using a consumption prediction model; a step 4 of using the mass flow rate of the consumed unburned hydrocarbon to calculate a calibration factor; and a step 5 of using the calibration factor to control a next spray volume. The present invention aims to provide the method of controlling the heating catalyst temperature based on the prediction model of unburned hydrocarbon in the heating catalyst, which is able to prevent a temperature in the heating catalyst from rising and efficiently control the temperature of the DPF front end entrance.